Calculate the area under the graph of y = e^-x above the x-axis for the interval [1, ∞]

a) 0
b) e^-1 ------> my answer. Can you check for me, please?
c) -e^-1
d) infinity

1 answer

area= int e^-x from 1 to inf
= -e^-x over limits= -e^-inf + e^-1
your are right.
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